But Japanese researchers have made a compelling case that Earth's oceans were once green, in a study published in Nature. The reason Earth's oceans may have looked different in the ancient past is ...

A long-period comet that hasn’t been near Earth for 50,000 years is now visible with the naked eye. The comet known as C/2022 E3 (ZTF) is a dazzling green color chiefly because of the presence ...

Comet C/2022 E3 (ZTF) last passed Earth 50,000 years ago. If you're looking at the night skies Wednesday and make out a tiny green light in the sky, don't panic, aliens haven't landed. A rare ...

People in the Northern Hemisphere will soon be able to get a glimpse of a comet that hasn't been visible on Earth for more than 400 years. The rare green comet, named Nishimura after the amateur ...

It will come within 26 million miles (42 million kilometers) of Earth Wednesday before speeding ... Discovered less than a year ago, this harmless green comet already is visible in the northern ...

Although chlorophyll is great for photosynthesis in the spectra of light visible to us, PEB seems to be superior in green-light conditions. Before the rise of photosynthesis and oxygen ...

A team of astrophysicists, geoscientists, chemists and life scientists affiliated with a host of institutions in Japan has found evidence that billions of years ago, the Earth's oceans were green.